Era
20th century
910
19th century
853
1900-1999
316
18th century
184
1800-1899
178
21st century
159
Civil War, 1861-1865
134
17th century
119
16th century
72
To 1500
72
2000-2099
68
1775-1865
45
1809-1865
45
1945-
45
1700-1799
41
1946-
41
Colonial period, ca. 1600-1775
41
1939-1945
39
1800-1999
38
1564-1616
31
1949-
31
1980-
31
Revolution, 1775-1783
31
1933-1945
30
1861-1865
27
1917-1963
27
1816-1855
26
1743-1826
24
1832-1888
24
1950-
24
1969-
24
1700-1899
23
1929
23
1951-
22
1812-1870
21
1960-
21
1966-
21
1945-1989
20
Early modern, 1500-1700
20
1066-1485
19
1937-
19
1943-
19
1947-
19
1953-
19
1989-
19
1818-1848
18
1900 - 1999
18
1775-1817
17
1783-1865
17
1968-
17
more ...